refactor(studio): modularize into types, presets, layout, renderer, inspector, and app modules

Author: leftger

crates/embedded-gui-studio/src/app.rs

@@ -0,0 +1,40 @@
+//! Grid layout track calculation helpers for simulated 2D viewports.
+
+use embedded_gui_codegen::GridTrackDef;
+
+/// Resolves fractional (`fr`) and fixed (`px`) track constraints against available container size.
+pub fn compute_track_sizes(tracks: &[GridTrackDef], available_size: f32, gap: f32) -> Vec<f32> {
+    let n = tracks.len();
+    if n == 0 {
+        return vec![available_size];
+    }
+    let total_gap = gap * (n.saturating_sub(1) as f32);
+    let net_space = (available_size - total_gap).max(0.0);
+
+    let mut fixed_sum = 0.0;
+    let mut total_fr = 0u32;
+
+    for t in tracks {
+        match t {
+            GridTrackDef::Px(px) => fixed_sum += *px as f32,
+            GridTrackDef::Fr(fr) => total_fr += *fr as u32,
+            GridTrackDef::Auto => fixed_sum += 32.0,
+        }
+    }
+
+    let remaining = (net_space - fixed_sum).max(0.0);
+    let fr_unit = if total_fr > 0 {
+        remaining / (total_fr as f32)
+    } else {
+        0.0
+    };
+
+    tracks
+        .iter()
+        .map(|t| match t {
+            GridTrackDef::Px(px) => *px as f32,
+            GridTrackDef::Fr(fr) => (*fr as f32) * fr_unit,
+            GridTrackDef::Auto => 32.0,
+        })
+        .collect()
+}